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Tamar Christina 5471f55f00 AArch32: Fix 128-bit sequential consistency atomic operations.
Similar to AArch64 the Arm implementation of 128-bit atomics is broken.

For 128-bit atomics we rely on pthread barriers to correct guard the address
in the pointer to get correct memory ordering.  However for 128-bit atomics the
address under the lock is different from the original pointer.

This means that one of the values under the atomic operation is not protected
properly and so we fail during when the user has requested sequential
consistency as there's no barrier to enforce this requirement.

As such users have resorted to adding an

#ifdef GCC
<emit barrier>
#endif

around the use of these atomics.

This corrects the issue by issuing a barrier only when __ATOMIC_SEQ_CST was
requested.  I have hand verified that the barriers are inserted
for atomic seq cst.

libatomic/ChangeLog:

	PR target/102218
	* config/arm/host-config.h (pre_seq_barrier, post_seq_barrier,
	pre_post_seq_barrier): Require barrier on __ATOMIC_SEQ_CST.
2022-08-08 14:37:42 +01:00
INSTALL
c++tools Daily bump. 2022-03-19 00:16:22 +00:00
config Daily bump. 2022-08-02 00:16:51 +00:00
contrib Daily bump. 2022-08-03 00:16:48 +00:00
fixincludes Daily bump. 2022-02-28 00:16:17 +00:00
gcc lto/106540 - fix LTO tree input wrt dwarf2out_register_external_die 2022-08-08 11:13:13 +02:00
gnattools Daily bump. 2021-10-23 00:16:26 +00:00
gotools Daily bump. 2022-02-14 00:16:23 +00:00
include Daily bump. 2022-07-13 00:16:33 +00:00
intl Daily bump. 2021-11-30 00:16:44 +00:00
libada Update copyright years. 2022-01-03 10:42:10 +01:00
libatomic AArch32: Fix 128-bit sequential consistency atomic operations. 2022-08-08 14:37:42 +01:00
libbacktrace Daily bump. 2022-07-09 00:16:54 +00:00
libcc1 Daily bump. 2022-06-28 00:16:58 +00:00
libcody Daily bump. 2022-06-04 00:16:27 +00:00
libcpp Daily bump. 2022-07-16 00:16:30 +00:00
libdecnumber Daily bump. 2022-05-21 00:16:32 +00:00
libffi Daily bump. 2021-11-16 00:16:31 +00:00
libgcc Daily bump. 2022-07-19 00:16:32 +00:00
libgfortran Daily bump. 2022-08-02 00:16:51 +00:00
libgo libgo: use SYS_timer_settime32 2022-07-30 10:35:23 -07:00
libgomp Daily bump. 2022-07-30 00:16:30 +00:00
libiberty Daily bump. 2022-07-23 00:16:27 +00:00
libitm Daily bump. 2022-06-03 00:16:40 +00:00
libobjc Update copyright years. 2022-01-03 10:42:10 +01:00
liboffloadmic Daily bump. 2022-07-05 00:16:36 +00:00
libphobos Daily bump. 2022-08-04 00:16:49 +00:00
libquadmath Daily bump. 2022-01-12 00:16:39 +00:00
libsanitizer libsanitizer: Cherry-pick 2bfb0fcb51510f22723c8cdfefe from upstream 2022-08-01 06:10:31 +02:00
libssp Update copyright years. 2022-01-03 10:42:10 +01:00
libstdc++-v3 Daily bump. 2022-08-06 00:16:27 +00:00
libvtv Update copyright years. 2022-01-03 10:42:10 +01:00
lto-plugin Daily bump. 2022-08-02 00:16:51 +00:00
maintainer-scripts Daily bump. 2022-07-29 00:16:21 +00:00
zlib Daily bump. 2021-12-17 00:16:20 +00:00
.dir-locals.el dir-locals: Use https for bug references 2021-07-20 11:40:34 +01:00
.gitattributes Add *.md diff=md. 2020-01-15 14:29:53 +01:00
.gitignore .gitignore: do not ignore config.h 2022-07-19 17:07:04 +03:00
ABOUT-NLS
COPYING
COPYING.LIB
COPYING.RUNTIME
COPYING3
COPYING3.LIB
ChangeLog Daily bump. 2022-08-05 00:16:24 +00:00
ChangeLog.jit
ChangeLog.tree-ssa
MAINTAINERS Add myself as AutoFDO maintainer 2022-08-04 13:38:28 -07:00
Makefile.def PR bootstrap/106472: Add libgo depends on libbacktrace to Makefile.def 2022-07-31 08:13:30 +01:00
Makefile.in Add TFLAGS to gcc's GCC_FOR_TARGET 2022-06-28 09:41:07 -03:00
Makefile.tpl Add TFLAGS to gcc's GCC_FOR_TARGET 2022-06-28 09:41:07 -03:00
README
ar-lib
compile
config-ml.in config-ml.in: Suppress output from multi-do recipes 2020-11-09 14:28:37 +00:00
config.guess config.sub, config.guess : Import upstream 2021-01-25. 2021-02-23 17:21:10 +08:00
config.rpath
config.sub config.sub: change mode to 755. 2021-12-21 09:10:57 +01:00
configure Update configure to check for a recent gnat Ada compiler. 2022-08-01 11:40:50 +01:00
configure.ac [gdb/build] Fix gdbserver build with -fsanitize=thread 2022-06-27 10:52:23 +02:00
depcomp
install-sh
libtool-ldflags
libtool.m4 Revert "Sync with binutils: GCC: Pass --plugin to AR and RANLIB" 2021-12-15 20:45:58 -08:00
ltgcc.m4
ltmain.sh Do not use HAVE_DOS_BASED_FILE_SYSTEM for Cygwin. 2020-04-17 09:22:51 +02:00
ltoptions.m4
ltsugar.m4
ltversion.m4
lt~obsolete.m4
missing
mkdep
mkinstalldirs
move-if-change
multilib.am
symlink-tree
test-driver
ylwrap

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